package com.study.cloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {

    /**
     * 正常访问
     *
     * @param id
     * @return
     */
    public String paymentInfo_ok(Integer id) {
        return "线程池" + Thread.currentThread().getName() + "paymentInfo_ok,id：" + id + "\t" + "==========>哈哈~";
    }


    /**
     * 异常访问，服务降级
     *
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_errorHandler", commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "3000")
    })
    public String paymentInfo_error(Integer id) {
        int timeNumber = 5;
        try {
            TimeUnit.SECONDS.sleep(timeNumber);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池" + Thread.currentThread().getName() + "paymentInfo_error,id：" + id + "\t" + "==========>耗时" + timeNumber + "秒钟";
    }

    //异常处理
    public String paymentInfo_errorHandler(Integer id) {
        return "线程池" + Thread.currentThread().getName() + "paymentInfo_errorHandler,id：" + id + "\t" + "================>系统繁忙，稍后再试！超时处理";
    }


    //=====================服务熔断
    @HystrixCommand(fallbackMethod = "paymentCircuitBreakerFallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"), //是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),//请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"), //时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60") //失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id) {
        if (id < 0) {
            throw new RuntimeException("==============>id 不能负数");
        }
        String serialNumber = IdUtil.simpleUUID();
        return Thread.currentThread().getName() + "\t" + "调用成功，流水号：" + serialNumber;
    }

    public String paymentCircuitBreakerFallback(@PathVariable("id") Integer id) {
        return "===========id 不能负数，请稍后再试。 id:" + id;
    }
}
